Re: VCO TP Frequency OK and CW tone OK - RESOLVED

Don Woodward

Finally - I got the CW sounding like it should - I modified some filter settings on filter 3 on my IC-705 IF radio and it sounds good to me.  

See new video at top of my blog at 

Thanks again to all here who replied to my posts on this - there's so much RF talent here!

Now to get this second unit in a case.


Don W.

From: <> on behalf of Rus Healy, K2UA via <Rus.healy@...>
Sent: Friday, September 3, 2021 7:24 AM
To: <>
Subject: Re: [The122GProject] VCO TP Frequency OK now but no IF output still

Seems like you're off frequency. You should have a strong, clear CW note. But yes, it's definitely working--glad to see you've cleared that hurdle!

--73, Rus

On Fri, Sep 3, 2021 at 3:00 AM Don Woodward <dbwoodw@...> wrote:
Progress - pointing them directly at each other about 2 feet away from each other with chaparral feed (TX) on one and the conical horn (RX) on the other - I hear the beacon.

The TX is on a battery and the RX is on a power supply - going to hookup RX to a battery next to see if that improves things.

The video is at the top of my blog at 


Don W

From: <> on behalf of Zack Widup via <>
Sent: Friday, September 3, 2021 12:02:53 AM
To: <>
Subject: Re: [The122GProject] VCO TP Frequency OK now but no IF output still
When you switch the unit on with the IF rig attached, what kind of increase in noise do you hear?  Mine increases by probably a few dB. Do you hear anything in the pass band on the receiver when the other unit is transmitting in beacon mode? Even when I'm not tuned right on it, I hear a noticeable hiss increase in the receiver with the CW.

73, Zack W9SZ

On Thu, Sep 2, 2021 at 7:11 PM Don Woodward <dbwoodw@...> wrote:
Yes sir initially red when powered on then green - solid red on key of mike or cw key, with both mike and key switches it flashes red in sync with beacon and I hear sidetone of beacon.  This is working for both.  

73’s DE KD4APP 

From: <> on behalf of Mike Lavelle K6ML via <>
Sent: Thursday, September 2, 2021 7:58:59 PM
To: <>
Subject: Re: [The122GProject] VCO TP Frequency OK now but no IF output still
Don -

I wouldn't jump to reflashing so quickly...

Does your LED change color from tx to rx?
Do you hear any noise on the IF out?

Check out these two previous posts:  #1012 and #1516   for some simple tests

Check your control wiring, see:



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